Quantinuum
Quantinuum is an integrated quantum computing company formed by the 2021 merger of Honeywell Quantum Solutions and Cambridge Quantum. It builds trapped-ion (QCCD) quantum computers — the H1, H2, and Helios System Models — and develops the full software stack that runs on them: the Nexus cloud platform, the TKET quantum compiler, the InQuanto computational chemistry package, the lambeq quantum natural language processing toolkit, the Guppy quantum programming language, the Selene emulation framework, and the Quantum Origin verifiable randomness service. Programmatic access to Quantinuum systems is delivered through the Nexus platform (Python client `qnexus` plus a REST/OpenAPI surface) and via partner clouds; circuits are described in OpenQASM 2.0 and the Quantum Intermediate Representation (QIR).
More than an index entry, but the surface is still mostly links rather than artifacts — the cohort most likely to move a full band from modest, well-targeted work.
API Evangelist profiles Quantinuum the way a machine reads it — 30 machine-readable artifacts across 9 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Quantinuum scores 19.4/100 (emerging), with a separate agent-readiness read of 0/100 (human only). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile Quantinuum
Each block below is one kind of artifact we hold for Quantinuum. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 9
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Quantinuum Nexus
Nexus is Quantinuum's all-in-one quantum computing cloud platform. It brokers access to Quantinuum H-Series hardware (H1, H2, Helios) and to partner backends including IBM Quant...
Quantinuum Systems (H-Series)
The Quantinuum Systems API exposes the H-Series trapped-ion (QCCD) quantum computers — System Model H1, System Model H2, and the next-generation Helios — for circuit submission....
TKET
TKET is Quantinuum's optimizing quantum compiler. The Python interface `pytket` and the C++ core `tket` provide gate-level circuit construction, hardware-agnostic optimization p...
InQuanto
InQuanto is Quantinuum's computational quantum chemistry platform for molecular and materials simulations on near-term and fault-tolerant quantum computers. It implements VQE, q...
lambeq
lambeq is Quantinuum's open-source Python toolkit for Quantum Natural Language Processing (QNLP). It converts sentences into string diagrams (DisCoCat / DisCoCirc), rewrites the...
Guppy
Guppy (`guppylang`) is Quantinuum's Pythonic quantum-classical programming language. Guppy programs compile through the HUGR hierarchical intermediate representation and target ...
Selene
Selene is Quantinuum's plugin-extensible emulator for hybrid quantum computation. It simulates the behavior of Quantinuum H-Series hardware including mid-circuit measurement, co...
Quantum Origin
Quantum Origin is Quantinuum's verifiable quantum random number generation service, delivering cryptographically strong entropy seeded by quantum measurements for use in PKI, ke...
Qermit
Qermit is a Python module for running error-mitigation protocols (probabilistic error cancellation, zero-noise extrapolation, Clifford data regression, dynamical decoupling, etc...
Scroll within the panel for all 9 ·
Features 20
The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.
Notable capabilities this provider offers.
Scroll within the panel for all 20 ·
Security Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for Quantinuum — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 4
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Build 15
SDKs, sample code, and the tooling you integrate with
Scroll within the panel for all 15 ·
Access & Security 1
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Company 2
The organization behind the API
Other 3
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/quantinuum · machine-readable index on apis.io